Mount Union, Pennsylvania Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Mount Union weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle25%0.01″98°73°—
- SundayJul 5Showers95%0.45″90°72°-8°
- MondayJul 6Thunderstorm86%0.14″80°66°-10°
- TuesdayJul 7Light Drizzle73%—77°63°-3°
- WednesdayJul 8Overcast16%—87°58°+10°
- ThursdayJul 9Overcast41%—92°63°+5°
- FridayJul 10Drizzle46%—90°68°-2°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.0 µg/m³ (AQI 50) with a 0.94 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 49 now. With UV 4.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 26 around 1 PM.
- Present
- AQI 49
- UV peak
- 4.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5 at 9.0 µg/m³ (AQI 50) with a 0.94 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:05 PM
- Moonset
- 10:14 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Mount Union at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 17066
16-Day Forecast — Mount Union
- Sat97°73°25%
- Sun90°72°95%
- Mon80°66°86%
- Tue77°63°73%
- Wed87°58°16%
- Thu92°63°41%
- Fri90°68°46%
- Sat87°69°33%
- Sun81°65°30%
- Mon82°62°16%
- Tue79°63°13%
- Wed86°66°26%
- Thu96°67°24%
- Fri94°71°33%
- Sat82°70°40%
- Sun90°67°42%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Mount Union
SPC has placed Mount Union in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Mount Union
- 17066